Residual Free Chlorine QC CRM

Catalog Number：QCI-012

Solvent： Water

Hazards： Irritant

This quality control sample was manufactured by NSI Lab Solutions fllowing quality procedures meeting the requirements of ISO 9001,ISO 17025, and ISO 17034. Acceptance limits are set at current NELAC standards. The study mean is set at the mean of an interlaboratory proficiency testing study with outlier rejection. This CRM is intended to be used to validate analytical methods, for detection limit studies, and analyst proficiency testing.

Storage & Instructions For Use

Store the unopened ampule at 2-8°C. Keep away from light

Prior to opening the ampule, mix contents gently by inversion 3-5 times.
Fill a 1000 mL Class A volumetric flask with about 900 mL of chlorine free and organics free reagent water.
Open the ampule and pipet exactly 1.0 mL of the concentrate into the flask.
Bring the flask to volume with reagent water and mix well.
This represents the sample for immediate analysis.

Traceability Information

Analyte Source Materials：The highest purity analyte source materials are used in the manufacture of this CRM.Analyte source material purity and associated uncertainty has been analytically verifed against appropriate NIST SRMs, where available.

Balance

All analytical balances are calibrated on a semiannual basis by an ISO 17025 accredited calibration laboratory and are traceable to NIST. Traceable Calibration Certificate available upon request.

All balances are checked daily by an in-house standard operating procedure. The weights used for this daily verification are calibrated annually by an IsO 17025 accredited calibration laboratory and are certified traceable to NIST. Cerificate of Calibration and Traceability available upon request.

Thermometer

All thermometers are NIST traceable through thermometers that are calibrated annually by an ISO 17025 accredited calibration laboratory.

Glassware

All glassware used in the manufacture of our samples is Class A. An in-house standard operating procedure is used to verify all glassware prior to it being placed into service. Volumetric pipetors are calibrated every four months by an ISO 17025 accredited calibration laboratory.

Uncertainty

The ± uncertainty associated with the certifed concentration is the expanded uncertainty at 95% confidence interval (CI) with K=2. This expanded uncertainty incorporates contributions from manufacturing, homogeneity, and stability.

Homogeneity

This quality control CRM was thoroughly mixed in production. Batch homogeneity was established through analyses of samples chosen at random.

Stability/Expiration

The stability of this quality control CRM is based on short-term and long-term monitoring of the certifed concentration.The expiration date is guaranteed to be valid from the manufacture date and is based on results of long-term monitoring. Guarantee is applicable to the unopened ampule.

注：证书信息仅供参考，以产品附带证书为准。